How to disassemble and assemble the cartridge yourself
In order to carry out maintenance and repair of the punch chuck with your own hands, it is important to properly remove and disassemble this device. Knowing how to disassemble a hammer drill chuck (or how to disassemble a drill chuck), you will be able to independently inspect, clean and even minor repairs of its internal elements, which will allow you to always keep your tool in good technical condition.
The uncomplicated design of SDS cartridges allows them to be removed and disassembled even by people who do not get along with technology.
Step one
The plastic part is removed from the cartridge and the rubber seal is removed.
Removing the punch chuck. Photo 1
Step two
Using a screwdriver, remove the retaining ring and then the retaining washer.
Removing the punch chuck. Photo 2
Step three
When the retaining washer is removed, a second ring can be seen underneath, which must also be removed with a screwdriver.
Removing the punch chuck. Photo 3
Step four
After all rings and washers have been removed, you can begin to disassemble the SDS-mechanism, which consists of a washer, ball and spring. First of all, it is necessary to remove the ball from such a mechanism, then the washer and only after that the spring.
Removing the punch chuck. Photo 4
All parts of the chuck mechanism, if you carry out maintenance, must be cleaned of dirt and dust, lubricated, and then assemble the device in the reverse order.
To get even more familiar with the question of how to remove a cartridge from a hammer drill or drill, how to properly disassemble it, perform maintenance or minor repairs, you can study not only theoretical information, but also watch the corresponding video.
Punch adapter
This is a great option for those who need to use rotary hammers not only for drilling, but also for other functions. You can purchase such an adapter at an affordable price and use it for drilling or drilling various materials. At the same time, one of its main advantages is that with it you can quickly change the nozzles, increasing productivity. This makes the hammer drill more convenient to use.
SDS cartridge
Today the SDS cartridge is in demand due to its reliability and ease of installation. It can be quick-release, and the main difference is that you can tighten the nozzles with your palms. To ensure the durability of such a cartridge, it is necessary to periodically lubricate and clean it from dust.
Accessories and tools
In addition to the drills themselves, complete with SDS chucks, you can use various adapters for the hammer drill. This allows you to significantly expand the functionality of the hammer drill and use it to perform various jobs.
Adapters and adapters for equipping a hammer drill allow, simply by changing the tools in it, use such equipment for drilling, use it to drill deep holes in hard materials, and also carry out many other types of work. The hammer drill with its high power will perfectly cope with the tasks that a low-power electric drill cannot solve. Such tasks, in particular, include drilling wood products using powerful drills, making holes in concrete structures using a crown-type tool.
The operation of the hammer drill with a drill with a cylindrical shank is possible using an adapter, onto which an ordinary cam chuck is screwed
When using a hammer drill and a hammer drill chuck of the SDS category, it should be borne in mind that the design of such a clamping mechanism assumes the presence of a backlash, so you should not count on high accuracy of work. As a rule, rock drills are used in cases where high power is needed to complete the processing, rather than precision.
Installing a powerful tool using a light or mid-range hammer adapter can cause rapid equipment failure. In addition, if a heavy-duty drill installed in a light or medium grade drill sticks in the hole being created, this could cause the drill to rotate around its axis and cause serious injury. That is why the hammer drill must be used in combination with drills corresponding to its category.
The convenience of using the punch lies in the fact that for each type of work performed with its help, a special tool has been developed that perfectly copes with the tasks. The use of chucks for the SDS perforator allows you to replace such tools as quickly as possible, which significantly increases the productivity of working operations.
Assembled jaw chuck with adapter
The high efficiency of using such equipment as a hammer drill is also due to the fact that it can be used for processing both in the drilling mode and in the impact mode. Such technical capabilities make the hammer drill a truly versatile device that can be used as both a conventional drill and a jackhammer. In addition, special models of cartridges for the SDS perforator and the corresponding attachments for them make it possible to use such a device as a mixer, with which you can effectively mix various building mixtures.
Adapters and features of their choice
Before purchasing this device, you must take into account the type of cartridge that was previously used in the device. In modern models of rotary hammers, the following types of cartridges can be used:
- Sds-max. Holds 20mm shanks and fits on professional models.
- Sds-plus. It is used in household appliances and holds shanks up to 10 mm in diameter.
When choosing a hex head, all these factors must be taken into account, otherwise the chuck simply cannot be installed on the tool.
Also, when choosing, you need to pay attention to cartridges from well-known manufacturers, and it is recommended to purchase those elements for clamping the nozzles in which the use of special keys is not required. The purchase of such a chuck will allow you to conveniently perform work with a hammer drill and quickly replace drills if necessary.
You will learn how to use drills from a hammer drill in an electric drill in the following video.
Specialist recommendations
Also, to extend the life of this device, you need to use the perforator itself correctly.
The masters give such advice:
- Do not allow the device to idle for a long time.
- Do not apply strong pressure to the tool during operation.
- If you have to process soft materials, you need to use the shockless mode of operation.
- For hard substrates, lubricants or emulsions should be used.
- Use small borax.
- Clean the shank periodically.
- Do not overheat the device.
- Remove dust from the rotary hammer before and after work.
To perform all these activities, you can use special products and oils, including brushes, which can be purchased inexpensively in the store. If you adhere to these recommendations, then the tool will last a long time and will not fail.
Installing a conventional drill into a rotary hammer
When working with this tool, there may be cases when it is necessary to not only crush a certain base, but also drill a hole in it. In this case, it is necessary to have a tool with a shank, which allows you to install a drill of any diameter, regardless of the shape of the shank itself. The drill is installed using an adapter or adapter, which can be fixed on the tool.
Such a device currently costs about 300 rubles on the market and is of different types, which allows you to buy it for use with drills with different shapes of shanks. You need to purchase quick-release clamps, which will allow you to quickly change drills and serve the device longer.
With the help of such a device, it is possible to perform different types of work with a perforator, which the drill cannot cope with. Also, this machine is more powerful than a conventional drill, and therefore it can drill holes of sufficiently large diameters without overloading the tool.
It is also important to take into account that during operation, a backlash may appear in the cartridge, which means that this device is out of order. It is necessary to disassemble it and determine the causes of the malfunction.
Design and function of SDS category devices
The design and the principle by which the drill chuck of this category works is quite simple.
- The drill shank has two open guide grooves that move along the chuck splines located in its inner part. Due to the interaction of the internal splines of the chuck and the guide grooves of the shank, torque is imparted to the tool.
- There are also closed grooves on the drill shank, which, when combined with the ball clamps of the chuck, prevent the tool from falling out. The design of the SDS chuck is designed in such a way that no stress is placed on the ball retainers during machining.
- In order to transfer the shock load to the end of the drill, a so-called hammer is used in the construction of the hammer, which is powered by a pneumatic or electric drive.
Diagram of the clamping-drive unit of the perforator
To remove or install a tool with an SDS shank, proceed as follows:
- pulling on the movable ring of the chuck, release the ball clamps and remove the drill;
- lower the ring (thereby fixing it with the balls entering the connection with the closed grooves of the shank) to install the drill.
Diagram of SDS-punch chuck
Why a special cartridge is needed
To begin with, it should be noted that, despite the external similarity of a hammer drill with a drill, these tools have a completely different design. In a drill, the chuck rotates by transmitting torque from the motor shaft through a gearbox of several gears. To ensure reliable fixation of the drill, a collet mechanism is used in the drill.
In rock drills, torque is converted from rotary to reciprocating. There is also a normal rotation mode in this unit. Due to the presence of a reciprocating motion, the device is equipped with a special type of retainer. In the considered tools, the use of collet chucks is unacceptable, since they are not able to withstand reciprocating movements. That is why a special SDS chuck is used, capable of withstanding the loads of both rotational and reciprocating movements.
If it becomes necessary to use a drill for a drill in a hammer drill, then there is no need to replace the chuck for this. For this, there are special adapters for the hammer drill, through which you can install any nozzles with a cylindrical or hexagonal shank. Such adapters can significantly simplify the life of the master, especially if there are drills for a drill in the arsenal.
How to insert a conventional drill into a hammer drill
Cases when it is necessary to drill not concrete, but metal or any other material with a hammer drill, are not uncommon. To do this, the master has to resort to the use of special drills with SDS shanks. Such drills are available in various diameters, but their disadvantage is their high cost, which is several times higher than conventional drills with cylindrical shanks.
To be able to install a drill with a cylindrical shank in a hammer drill, you will need to buy a special adapter or adapter. Such an adapter is fixed in the chuck of the tool used, like a conventional drill.
The adapter together with the collet chuck costs about 300 rubles
At the same time, it is important to note that such products are of both key and quick-clamping types. Having installed such a lock, you can use any attachments with a cylindrical shank, for example, drills, mixer, crowns
A large number of revolutions of the drill does not always allow mixing solutions. That is why they resort to the use of powerful aggregates, especially if it is required to mix large volumes of solution.
The masters recommend purchasing quick-release types of clamps, since the hammer drill is a rather heavy machine, so it is very difficult to hold it and unscrew the nozzle with a key. The use of a quick-release latch allows you to quickly and efficiently replace the attachments, in contrast to the key one.
The use of adapters allows you to carry out various types of work using a hammer drill, while drills are not able to cope with them. For example, it is very difficult to drill a large diameter hole in wood with a low-power drill. In order not to overload the drill, which can burn out from overload, it is recommended to use a hammer drill. This tool will drill a hole of any diameter that a drill could not handle.
Features of choosing an adapter
When choosing an adapter for a punch, you should take into account the type of chuck used in the tool. These units can use cartridges of the following types:
- SDS-plus, which are used in domestic machines. They allow the installation of shanks with a diameter of 10 mm.
- SDS-max. Such chucks allow you to fix shanks with a diameter of 20 mm, and are mainly used in professional models.
When choosing an adapter, this factor should be taken into account, otherwise the adapter simply will not fit the tool. When choosing, it should also be borne in mind that key cartridges are more reliable, but at the same time require the use of a special key. Quick-clamping devices are easy to use, but at the same time have a small resource of work.
In conclusion, the effectiveness of the tool in question should be noted. Although the drill allows you to solve many different technological problems, the hammer drill is used where power plays an important role.
What is SDS
SDS (SDS) is an abbreviation made up of the first letters of the words Steck, Dreh, Sitzt, which translated from German mean "insert, turn, secured." The SDS cartridge developed by Bosch engineers in the 80s of the last century works precisely according to this simple, but at the same time ingenious principle. Today, 90% of all rotary hammers manufactured are equipped with these easy-to-use devices providing high reliability of fixing of the working tool.
SDS-chucks are often called keyless chucks, but they should not be confused with devices in which clamping is provided by rotating the couplings. Unlike traditional keyless chucks, the SDS retainer does not need to be rotated to secure the tool: simply hold it with your hand.
To understand the device of this type of hammer drill chuck, as well as its principle of operation, it is enough to look at the shank of the tool, which is designed to be fixed in such a device, or the SDS adapter. Such a shank has 4 grooves, two of which are open from the end of the shank, and the other two are closed. The open grooves act as guides to ensure the correct position of the tool as it enters the chuck. The closed slots, in turn, secure the shank in the hammer chuck.
Diagram of the percussion mechanism of the punch
In the inner part of the SDS cartridge there are special balls that simultaneously perform two functions. The moment the tool is just inserted into the hammer drill, the balls along which the guide grooves move ensure its correct position. After the tool is inserted all the way, such balls fix it, for which it is necessary to turn it a little until the balls enter the closed grooves of the shank. To make the use of the SDS chuck even easier, it is recommended not only to thoroughly clean the tool shank after each use, but also to lubricate it.
It should be borne in mind that due to the design features of SDS-chucks, the tool that is fixed in them is subject to a slight radial runout at idle, which does not in the least affect the accuracy of the processing performed. Meanwhile, the presence of a small backlash between the shank and the inner surface of the chuck protects the latter from the impact that drills and drills are exposed to during the operation of the hammer drill.
All rotary hammer chucks are equipped with rubber boots to protect against contamination